Improvement in screw-wrenches



UNITED STATES PATENT OFFICE.

AURY G. OOES, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN SCREW-WRENCHES.

Specication forming part of Letters Patent No. ll ,208, dated July 4, 1854.

To all whom it may concern:

Be it known that I, AURY G. Cons, of Vorcester, in theV county of Worcester and State of Massachusetts, have invented a new and useful Improvement in the Screw-Wrench or Ooach-VVrench,7 as it is commonly termed; and I do hereby declare that the same is fully described and represented in the following specification and the accompanying drawings, letters, gures, and references thereof.

Of the said drawings, Figure l denotes a side View of my improved wrench. Fig. 2 is central and longitudinal section of it.

The hammer or stationary jaw :is seen at A, as permanently fixed on the top of the shank B. The movable jaw is seen at C, it being adjusted to the shank, so as to be capable of sliding freely on it. The said shank B may be made with two of its opposite sides parallel to each other, while the other two below where the `sliding jaw slides, and down to a partition, Y, are made as curved cylindrical arcs, on which and above the partition Y a tube, G, is placed, the said tube being caused to embrace the shank and rotate freely on it. ln the middle of the tube is a milled head, H, while on the outer surface of the tube and above the said milled-head a screw, I, is cut, and with its thread runningin a direction opposite to that of a screw, E, which is formed on the external surface of that part of the tube G which is below the milled head Hf The said screw-nut I receives and screws through a female screw-nut or annulus, K, that is connected to the sliding jaw O by an arm, N, as seen in the drawings. The male screw E plays into a female screw, F, that is formed within a socket-tube, P, that is so fastened to the shank B by means of the part Q of the handle, the screw-nut S thereof, and the partition Y, which extends around the socket-tube, and part of the tube and shank projecting below it, as seen in Fig. 2. The

v tube I constitutes a part of the handle D, the

remainder of which may be made of wood, as seen at Q.

By grasping the handle D and rotating the tube G in one or the other direction the slidingjaw may be made to advance toward or recede from the hammer jaw. This movement of the sliding jaw is faster than the longitudinal motion of the tube G on the Shank B, and is compounded of such movement bf the tube Gand the longitudinal movement of the annulus K on the screw I ofthe tube G.

The above method of constructing a coachwrench renders the instrument very strong' and durable, and much more so than that described in Letters Patent of the United States, numbered 9,945, and gran ted to me on the 16th day of August 1853.

The extension of the tube G below the milled head H and into the handle contributes much to relieve the shank from being strained and injured between the handle and milled head.

The constructing a wrench with ajaw fixed to a bar (making part of'or attached to a handle) and with a movable jaw made to slide on the bar and moved either toward or away from the Xed jaw by means of lnale and female screws is a very old device. So the employment of a pawl and a rack to adjust the sliding jaw in position is veryold, and are by no means claimed by me.

By inspection of my improved wrench it will be seen that it in no respect involves the principle ofcombinin'g with a wrench in which the inner jaw slides on a bar permanently attached to the outer jaw and making part ot' or permanently attached to the handle, a screw-thread and nut connecting the movable jaw with the said bar between the said movable jaw and that part of the handle grasped by the operator. Nor does my wrench embrace the principle or the arrangement of forming a screw on two circular edges of the dat bar to which the hammer-jaw is affixed. In my wrench there is no screw-cut on the main bar; nor is the movable jaw connected to the bar by a screw and nut, for in my wrench the screws connect'the handle and the sliding jaw, while the handle is separate from and is connected to the bar back of or below the screws, and carries a socket-tube, P, having a female screw cut in it, such tube making part of the handle.

My improved wrench as above specified may be said to have the same combination of parts as is claimed in my saidLetteis Patent, my present invention being a new arrange ment of some of the elements of such combination; consequently a patent covering my presentinvention will be subordinate to the L former patent, and the subject of it can only be made, sold, or used with the license of 1 sockettube,1on the handle, substantially as those holding that patent. specified.

What I claim is- In testimony whereof I have hereunto set The arrangement of the elevating-screw E, my signature this 23d (lay of February, A. D. (made as a male screw) of the tube G on the 1854.

external surface of the tube and so as to exi AURY G. GOES. tend below the milled head H, and the screw Witnesses: I, in combination with the arrangement of the HENRY OHAPIN,

screw F (made as a female screw) within a v GEORGE E. WVOOD. 

